Abstract
Ru-mediated interlayer exchange coupling (IEC) was introduced in Co∕Pd(111) metallic multilayers with perpendicular magnetic anisotropy. The magnetic and electronic transport properties were investigated. The magnetically controlled Co∕Pd(111) multilayers exhibited unique resistivity changes. This is quite common in perpendicular antiferromagnetically (AF) coupled systems where the AF coupled multilayer stacks switch separately during field reversal. However, we found that even within the stacks, the individual ferromagnetic layers switch separately, such that the AF configurations are present during reversal even within the same multilayer stack. On considering the magnetic reversal and transport properties of the Co∕Pd multilayers, the IEC was found to cause antiferromagnetic alignment inside a multilayer stack that was sandwiched between two Ru layers. This phenomenon is mainly due to the thicker Pd films between the Co layers that allow more decoupling of individual Co layers than those employed in most of the previous studies.
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